Spark-plug



J. IACONO.

SPARK PLUG.

APPLICATION FILED NOV. 27, 1918.

Patencgd June 17, 1919.

20 a tl' JOSEPH IACONO, OF NEW BRUNSWICK, NEW JERSEY.

SPARK-PLUG.

Specification of Letters Patent. mt m q June 7, 19

, A pplicatipn filed November'27,1918. 'serialnmsmss.

Be it known'that I,"JosEPH IACONO, a

subject the -King' ofltaly, (who has declared his intention of" becoming a cltizen of the United States) residing at New Bruns wick; county of 'Middlesex; and" State of @New Jerse haveinvente'd a certain new and useful SparkQPlugof which the following is a specification. i a

This inier'itionisa spark plug for internalcombustionfengines, the objectin view being to"el"i m-iria't e to amarkeddegree the deposit ofT'carbon' upon the terminals of the elecpreferably, 'in' the form of aptopellerWvhcel tri'ca'lly, operated Accoi'ding'to my "inv-entiornthe plug is 4, provid'e'dfwithfalongitudinal stem or rod: which constitutie's' one terminal, the other termi; ilbeing in the form of amulti-bladed rot'z elinentmoiinted in such relation to l k s. m r red as to produce a spark gap. Said rotary element or terminal 'is embodied,

the blades of which are spirals adapted to 'be act-ed upon by the 'rotative movement at relhtively"high' speed to the rotary element as ztunit;I"where'by any lodgment of lubri- "catirig oil, or other; liquid or semi liquid ma'ttelg alpon the rotary element will be thrown o'ifby centrifugal force and thus the deposit and accumulation of carbon upon I the plug terminals will be eliminated automatica' llyf sojthat the waste products" will be carried ioiitwith the exhaust gases and further; tli leposit of carbon within the engine cylinder-will be reduced material extent.

In my device," the propeller wheel ter mi-nal is mounted on the plug for rotation on an axis extending at a. right angle to the terminal producing rod or stem, and thus the propeller wheel terminal is positioned for thepenipheral edges of its blades to be presented inoperative relation to the extremity of thevstem or rod, thus result-ing in a spark gap the length. of which isvaria'hle owing to the fixed position of the stem or rod and to the rotary motion of the propeller wheel terminal with respect to said rod, as a result of which the are or spark is drawn out in the normal operation of the plug and a hot spark is produced which insures high combustion, efficiency and econ omy.

Further, it is preferred to incase the propeller wheel terminal within the plug with gas firing" elements of the a view to excludingto a material extent the lodgment of oil thereon. Accordingly. the

inner end ofthe plug is closed except for 5,

theprovision of 'a transverse slot, within which slot is positioned the rotary terminal,

so that the sides and edge portions thereof are-housed within the surfaces of the plug, although the margins of the' slot are open for thefree flow or circulation of gases through the slot in order that the spark may explode the chargeand the suction of the gases will so act upon the rotary termlnal as to impart rapid rotationvthereto.

In the drawings, "Figure 1 is a side elevation of a spark plug-provided with my new rotary termlnal.

Fig. 2 is an end View looking at the inner part of the plug.

F ig. 3 is'a view of the plug showing the latter in section on the line 33 of Fig. 1

for the better illustration of the rotary terminal.

The body A onal for apart of'lits length and threaded exteriorly at a in order that it, may beverse slot D therein, said slot extending across theplug and being open on the opposite faces thereof.- The inner end portion 0 of the rod or of the spark plug is polyge stem extends into the slot D, see'F ig. 3, and

said end portion a constitutes one ofthe terminals of the electric circuit lay-which the spark is produced.

The salient featurecof my inventionvis a rotary terminal E positioned in cooperative relation to the terminal 0 and carried by the plug for rotation on an axis which is at a right angle to the length of the stem or rod K3, as a result of which the rotary terminal is positioned for its peripheral edge tolie opposite to the terminal a and thus produce a spark gap across which the current will leap to produce the required spark. Said rotary terminal E is embodied, preferably, as a thereinby a pin or arbor F, the latter being fixedlysecured in the solid end portion 03 of the plug and said arbor having good electrimulti-blacled wheel, the blades e of which are spirally formed to the end that the flow of gases within the enginecylinder acts upon the blades so as to impart rotative movement to the wheel. 'As shown, therotary terminal is formed in a single piece, stamped and struck up from sheet metal, and provided with four blades; but it is apparent that the number of blades and the form thereof are not material and, further, that the rotary terminal may be composed of material other than sheet metal and be manufactured by processes other than :bysta-mping the same.

The rotary terminal is positioned within the slot D of the plug and it is mounted cal contact with the rotary terminal E and the plug A.- .v a v It-will be noted that the side and edge portions of the rotary terminal E are within the -slotted part of the plug, so that the rotary terminal is incased, for all practical pur- 'poses, by the slotted part (1 of the plug, thus minimizing the lodgment of oil upon the terminal E, but at the same time the gases Within the cylinder are free-to flow through the space afforded by the slot. The gases are thus ignited by the spark at the plug, and the movement of the gases imparts rotative movement to the rotary terminal E,

which'rot'ation of part Erelative to terminal C- produces a long hot spark for the ignition Gopiesot this patent may be obtained for of the gases;

' It is thought the operation and advantages of the invention will be apparent from the foregoing description. In my spark plug, as a matterof practical construction, itv is preferred to so position tion ,in the rotation may arise for unfore seen conditions, it is to be understood that the spark plug will continue to-function and to operate so as to meet the requirements, for the reason that in such event the plug will still act to furnish a spark in the same 1 and a rotatable terminal carried by the plug for rotation on an axis extending across the axis of the first terminal, said rotatable ter-.

minaI being provided with a plurality of blades separated one from the other by intervening spaces-and positioned for the -peripheral edges of said blades to lie opposite to the first terminal and produces therewith a succession of spark'gaps upon the rotation of said terminal.

2. A spark plug provided with a terminal, and a multi-blade terminal carried by said plug andmounted for rotation on an axis extending. at an angle to the axis of the plug, said multi-blade terminal being positioned for the peripheral portion of its blades to be spaced relatively to the first terminal and to form a spark gap therewith.

3. A spark plug provided with a terminal, and a rotatable terminal substantially incased by the plug and mounted therein for rotation on an axis extending at an angle to the axis of the plug, said rotatable terminal being positioned for the peripheral portion thereof to produce a spark gap relatively to the first terminal. r 4. A spark plug provided at its inner portion with a slot which opens through the respective faces of the plug, a fixed terminal, a rotatable terminal incased within the slot and positioned for the peripheral portions of its blades to produce a spark gap with the 4 fixed terminal, and an arbor in electrical ,contact with the plug and the rotatable terminal.

In testimony, whereof I have hereunto subscribed my name this 22 day of Novem ber, 1918.

JOSEPH IACONO.

five cents each, by addressing the ."Oommissionerof ratents, Washington, D. G. i 

